Plate XXXI 



Details of Cliironomus Pupw 



Frontal tu])erelo of favicingula. 



Dorsal abdominal lobe of lohiferus. 



Apical lateral process of segment 8 of deconis. 



Second dorsal abdominal segment of flavivingiiht. 



Ventral surface of apical segment of digitdtus (female). 



A]>ical lateral process of segment 8 of viridis. 



Second dorsal abdominal segment of viridis. 



Dorsal abdominal setnla^ of viridis: a, h, and c, setulffi of 



transverse group ; d, setnla of central group. 

 Second dorsal abdominal segment of digifafus. 

 Third dorsal abdominal segment of niodestus. 

 a and h. Apical lateral i)rocess of Cliironomus sp. A. show- 



injy variation in form in different individuals. 

 Frontal tubercle of dccorus. 



Third dorsal abdominal segment of i)idistinctHS. 

 Apical lateral process of segment 8 of indistinct us. 

 (I, reticulation of al)d()minal segments; h, c. (/, doi'sal al)dnm- 



iiial setuhe of digitotus. 

 Apical lateral process of segment 8 of palliatus. 

 Apical lateral process of segment 8 of inodestus. 

 Apical lateral jorocess of segment 8 of flavicingidn. 



